Renzi was speaking alongside Iranian President Hassan Rouhani, who was in Rome at the start of his first visit to Europe, which came less than two weeks after crippling economic sanctions on Tehran were lifted.

A government source said the two countries would sign deals worth up to 17 billion euros during Rouhani's 48-hour stay in Italy.

(Reporting by Isla Binnie, editing by Crispian Balmer)